xslt_set_sax_handlers
(PHP 4 >= 4.0.6)
xslt_set_sax_handlers — Set the SAX handlers to be called when the XML document gets processed
Description
xslt_set_sax_handlers() registers the SAX handlers for the document, given a XSLT processor resource.
Using xslt_set_sax_handlers() doesn't look very different than running a SAX parser like xml_parse() on the result of an xslt_process() transformation.
Parameters
- processor
-
The XSLT processor link identifier, created with xslt_create().
- handlers
-
handlers should be an array in the following format:
Where the functions follow the syntax described for the scheme handler functions.<?php
$handlers = array(
"document" => array(
"start_doc",
"end_doc"),
"element" => array(
"start_element",
"end_element"),
"namespace" => array(
"start_namespace",
"end_namespace"),
"comment" => "comment",
"pi" => "pi",
"character" => "characters"
);
?>Note:
The given array does not need to contain all of the different sax handler elements (although it can), but it only needs to conform to "handler" => "function" format described above.
Each of the individual SAX handler functions are in the format below:
-
start_doc ( resource $processor )
-
end_doc ( resource $processor )
-
start_element ( resource $processor , string $name , array $attributes )
-
end_element ( resource $processor , string $name )
-
start_namespace ( resource $processor , string $prefix , string $uri )
-
end_namespace ( resource $processor , string $prefix )
-
comment ( resource $processor , string $contents )
-
pi ( resource $processor , string $target , string $contents )
-
characters ( resource $processor , string $contents )
-
Return Values
No value is returned.
Examples
Example #1 xslt_set_sax_handlers() Example
<?php
// From ohlesbeauxjours at yahoo dot fr
// Here's a simple example that applies strtoupper() on
// the content of every <auteur> tag and then displays the
// resulting XML tree:
$xml='<?xml version="1.0"?>
<books>
<book>
<title>Mme Bovary</title>
<author>Gustave Flaubert</author>
</book>
<book>
<title>Mrs Dalloway</title>
<author>Virginia Woolf</author>
</book>
</books>';
$xsl='<?xml version="1.0"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="html" encoding="ISO-8859-1" indent="no" omit-xml-declaration="yes"/>
<xsl:template match="/">
<xsl:for-each select="books/book">
<livre>
<auteur><xsl:value-of select="author/text()"/></auteur>
</livre>
</xsl:for-each>
</xsl:template>
</xsl:stylesheet>';
// Handlers :
function start_document()
{
// start reading the document
}
function end_document()
{
// end reading the document
}
function start_element($parser, $name, $attributes)
{
global $result,$tag;
$result .= "<". $name . ">";
$tag = $name;
}
function end_element($parser, $name)
{
global $result;
$result .= "</" . $name . ">";
}
function characters($parser, $data)
{
global $result,$tag;
if ($tag == "auteur" ) {
$data = strtoupper($data);
}
$result .= $data;
}
// Transformation :
$xh = xslt_create();
$handlers = array("document" => array("start_document","end_document"),
"element" => array("start_element","end_element"),
"character" => "characters");
xslt_set_sax_handlers($xh, $handlers);
xslt_process($xh, 'arg:/_xml', 'arg:/_xsl', NULL, array("/_xml"=>$xml, "/_xsl"=>$xsl));
xslt_free($xh);
?>
You can also use xslt_set_object() if you want to implement your handlers in an object.
Example #2 Object oriented handler
<?php
// This is the object oriented version of the previous example
class data_sax_handler {
var $buffer, $tag, $attrs;
var $_xh;
function data_sax_handler($xml, $xsl)
{
// our xslt resource
$this->_xh = xslt_create();
xslt_set_object($this->_xs, $this);
// configure sax handlers
$handlers = array(
"document" => array('start_document', 'end_document'),
"element" => array('start_element', 'end_element'),
"character" => 'characters'
);
xslt_set_sax_handlers($this->_xh, $handlers);
xslt_process($this->_xh, 'arg:/_xml', 'arg:/_xsl', NULL, array("/_xml"=>$xml, "/_xsl"=>$xsl));
xslt_free($this->_xh);
}
function start_document()
{
// start reading the document
}
function end_document() {
// complete reading the document
}
function start_element($parser, $name, $attributes) {
$this->tag = $name;
$this->buffer .= "<" . $name . ">";
$this->attrs = $attributes;
}
function end_element($parser, $name)
{
$this->tag = '';
$this->buffer .= "</" . $name . ">";
}
function characters($parser, $data)
{
if ($this->tag == 'auteur') {
$data = strtoupper($data);
}
$this->buffer .= $data;
}
function get_buffer() {
return $this->buffer;
}
}
$exec = new data_sax_handler($xml, $xsl);
?>
Both examples will output:
<livre> <auteur>GUSTAVE FLAUBERT</auteur> </livre> <livre> <auteur>VIRGINIA WOOLF</auteur> </livre>